import axios, { AxiosInstance, AxiosPromise, AxiosRequestConfig, AxiosRequestHeaders, AxiosResponse, Method } from 'axios'
import { ElNotification, ElMessageBox, ElMessage, ElLoading } from 'element-plus'
import { getToken, removeToken } from '@/utils/auth'
import errorCode from '@/utils/errorCode'
import { tansParams, blobValidate } from '@/utils/commonUtils'
import cache from '@/plugins/cache'
import { saveAs } from 'file-saver'

let downloadLoadingInstance: any;
// 是否显示重新登录
export let isRelogin = { show: false };
//@ts-ignore
axios.defaults.headers['Content-Type'] = 'application/json;charset=utf-8'
import { RequestConfig, RequestInstance } from '@/types/request'
// 创建axios实例
const service: RequestInstance = axios.create({
    // axios中请求配置有baseURL选项，表示请求URL公共部分
    // 开发环境使用代理，生产环境使用完整API地址
    baseURL: import.meta.env.DEV ? '/api' : import.meta.env.VITE_API_BASE_URL,
    // 超时
    timeout: 10000
})

// request拦截器
service.interceptors.request.use((config: any) => {
    // 是否需要设置 token
    const isToken = (config.headers || {}).isToken === false
    // 是否需要防止数据重复提交
    const isRepeatSubmit = (config.headers || {}).repeatSubmit === false
    if (getToken() && !isToken) {
        // 让每个请求携带自定义token 请根据实际情况自行修改
        (<AxiosRequestHeaders>config.headers)['token'] = getToken()
    }
    // get请求映射params参数
    if (config.method === 'get' && config.params) {
        let url = config.url + '?' + tansParams(config.params);
        url = url.slice(0, -1);
        config.params = {};
        config.url = url;
    }
    if (!isRepeatSubmit && (config.method === 'post' || config.method === 'put')) {
        const requestObj = {
            url: config.url,
            data: typeof config.data === 'object' ? JSON.stringify(config.data) : config.data,
            time: new Date().getTime()
        }
        const sessionObj = cache.session.getJSON('sessionObj')
        if (sessionObj === undefined || sessionObj === null || sessionObj === '') {
            cache.session.setJSON('sessionObj', requestObj)
        } else {
            const s_url = sessionObj.url;                // 请求地址
            const s_data = sessionObj.data;              // 请求数据
            const s_time = sessionObj.time;              // 请求时间
            const interval = 1000;                       // 间隔时间(ms)，小于此时间视为重复提交
            if (s_data === requestObj.data && requestObj.time - s_time < interval && s_url === requestObj.url) {
                const message = '数据正在处理，请勿重复提交';
                console.warn(`[${s_url}]: ` + message)
                return Promise.reject(new Error(message))
            } else {
                cache.session.setJSON('sessionObj', requestObj)
            }
        }
    }
    return config
}, error => {
    console.log(error)
    Promise.reject(error)
})

type ResponseType = {
    code: string | number,
    message: string,
    data?: any,
    rows?: Array<any>,
    total?: any,
}

export type RequestPageType<T> = T & {
    page: number
    size: number
    params: { [key: string]: string }
}

// 响应拦截器
service.interceptors.response.use((res: any) => {
    // 未设置状态码则默认成功状态
    const code = String(res.data.code || 200);

    //获取错误信息
    const msg = errorCode[code] || res.data.message || errorCode['default']
    // 二进制数据则直接返回
    if (res.request.responseType === 'blob' || res.request.responseType === 'arraybuffer') {
        return res.data
    }
    if (code === '401') {
        return Promise.reject('无效的会话，或者会话已过期，请重新登录。')
    } else if (code === '500') {
        ElMessage({ message: msg, type: 'error' })
        return Promise.reject(new Error(msg))
    } else if (code === '601') {
        ElMessage({ message: msg, type: 'warning' })
        return Promise.reject(new Error(msg))
    } else if (code !== '200') {
        ElNotification.error({ title: msg })
        return Promise.reject('error')
    } else {
        return Promise.resolve(res.data)
    }
},
    error => {
        console.log('err' + error)
        let { message } = error;
        if (message == "Network Error") {
            message = "后端接口连接异常";
        } else if (message.includes("timeout")) {
            message = "系统接口请求超时";
        } else if (message.includes("Request failed with status code")) {
            message = "系统接口" + message.substr(message.length - 3) + "异常";
        }
        ElMessage({ message: message, type: 'error', duration: 5 * 1000 })
        return Promise.reject(error)
    }
)

// 通用下载方法
export async function download(url: string, params: any, filename: string, config: any) {
    downloadLoadingInstance = ElLoading.service({ text: "正在下载数据，请稍候", background: "rgba(0, 0, 0, 0.7)", })
    try {
        const data: Blob = await service.post(url, params, {
            transformRequest: [(params_1) => { return tansParams(params_1) }],
            headers: { 'Content-Type': 'application/x-www-form-urlencoded' },
            responseType: 'blob',
            ...config
        })
        const isLogin = await blobValidate(data)
        if (isLogin) {
            const blob = new Blob([data])
            saveAs(blob, filename)
        } else {
            const resText = await data.text()
            const rspObj: ResponseType = JSON.parse(resText)
            const errMsg = errorCode[rspObj.code] || rspObj.message || errorCode['default']
            ElMessage.error(errMsg)
        }
        downloadLoadingInstance.close()
    } catch (r) {
        console.error(r)
        ElMessage.error('下载文件出现错误，请联系管理员！')
        downloadLoadingInstance.close()
    }
}
const request = service
export function postAction(data: any, url: string, isToken: boolean = true) {
    return request({ data, url, method: 'POST', headers: { isToken }, })
}
export function getAction(params: any, url: string, isToken: boolean = true) {
    return request({ params, url, method: 'GET', headers: { isToken }, })
}
export function putAction(data: any, url: string, isToken: boolean = true) {
    return request({ data, url, method: 'PUT', headers: { isToken }, })
}
export function deleteAction(data: any, url: string, isToken: boolean = true) {
    return request({ data, url, method: 'DELETE', headers: { isToken }, })
}

export default request
